Abstract

We present two new measurements of the top‐quark mass. Using the same methodology applied in Run I, the CDF experiment uses 72 event/pb of Run II data to measure Mtop = 171.2 ± 13.4stat ± 9.9syst GeV/c2. On the other hand, the DO/ experiment, using 125 event/pb from Run I, and appling a new method that extracts information from data through a direct calculation of a probability for each event, obtains Mtop = 180.1 ± 3.6stat ± 4.0syst GeV/c2.